Silicon Valley entrepreneur David Goldberg died suddenly Friday night, members of the family said in Facebook posts. Goldberg, 47, was CEO of SurveyMonkey and husband of Facebook COO Sheryl Sandberg. Cause of death was not announced.

A self-described serial entrepreneur, Goldberg also served previously as vice president and general manager of Yahoo Music, after the company acquired his music service Launch Media in 2001. Also known for his sense of humor and easy wisecracking, Goldberg embraced being the less-famous half of one of the tech world’s power couples. Sandberg, the according to the New York Times, often said she could not have succeeded in her career without his substantial assistance at home.

In a statement, SurveyMonkey said: “Dave’s genius, courage and leadership were overshadowed only by his compassion, friendship and heart. Our sympathy goes out to them and to all who were touched by this extraordinary man. We are all heartbroken.”